Q. How many faradays of electricity are required to electrolyse $1\ mole\ {CuCl}_{2}$ to copper metal and chlorine gas?
A) 1 F
B) 2 F
C) 3 F
D) 4 F
Explanation
(b)
The cathode and anode reactions respectively are
${Cu}^{2 +} + \ 2e^{-} \rightarrow Cu$
$2{Cl}^{-} \rightarrow {Cl}_{2} + 2e^{-}$
The two moles of electrons have been transferred from anode to cathode to produce Cu and$\ {Cl}_{2}$ in a mole ratio of 1:1. Thus, 2F electricity is required
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.